On Thu, 2022-11-03 at 09:04 +0100, Francesco Dolcini wrote: > On Thu, Nov 03, 2022 at 08:46:58AM +0100, Alexander Stein wrote: > > Hi Philippe, > > > > Am Mittwoch, 2. November 2022, 16:52:26 CET schrieb Philippe > > Schenker: > > > From: Philippe Schenker <philippe.schenker@xxxxxxxxxxx> > > > > > > The Colibri standard provides a GPIO called USBC_DET to switch > > > from > > > USB Host to USB Device and back. The Colibri iMX6ULL does have the > > > SoC > > > ball USB_OTG1_VBUS connected in series with a capacitor to ground. > > > > > > This means that we need to provide to the extcon framework VBUS > > > and ID > > > events using the single GPIO we have. The Extcon USB GPIO driver > > > does > > > use id-gpio also for VBUS event, as in our case where vbus-gpio is > > > absent. > > > > > > Signed-off-by: Philippe Schenker <philippe.schenker@xxxxxxxxxxx> > > > > > > --- > > > > > > arch/arm/boot/dts/imx6ull-colibri.dtsi | 8 ++++++++ > > > 1 file changed, 8 insertions(+) > > > > > > diff --git a/arch/arm/boot/dts/imx6ull-colibri.dtsi > > > b/arch/arm/boot/dts/imx6ull-colibri.dtsi index > > > 577a424b0e1d..feb1fcd9a684 > > > 100644 > > > --- a/arch/arm/boot/dts/imx6ull-colibri.dtsi > > > +++ b/arch/arm/boot/dts/imx6ull-colibri.dtsi > > > @@ -24,6 +24,13 @@ backlight: backlight { > > > status = "okay"; > > > }; > > > > > > + extcon_usbc_det: usbc-det { > > > + compatible = "linux,extcon-usb-gpio"; > > > + id-gpio = <&gpio5 2 GPIO_ACTIVE_HIGH>; /* SODIMM > > > 137 / > > USBC_DET */ > > > + pinctrl-names = "default"; > > > + pinctrl-0 = <&pinctrl_snvs_usbc_det>; > > > + }; > > > + > > > gpio-keys { > > > compatible = "gpio-keys"; > > > pinctrl-names = "default"; > > > @@ -275,6 +282,7 @@ &uart5 { > > > /* Colibri USBC */ > > > &usbotg1 { > > > dr_mode = "otg"; > > > + extcon = <&extcon_usbc_det>, <&extcon_usbc_det>; > > > > How came you up with this double entries? Is there some > > documentation you need > > two phandles? > > extcon-usb-gpio provides both vbus/otg_id with a single handle, > however > the integration in chipidea is somehow weird, the first entry is > supposed to be > used to read the vbus, the second one to read the otg_id. > > So if you need to read both you really need to have the handle twice > ... Thanks for the suggestion Alex and Francesco for answering. I cannot add much more, we tried a lot back and forth due to the really special hardware-design this solution was the best we found for the colibri- imx6ull. Regards, Philippe > > Francesco >